html,body
  line-height: 1
  font-weight: 200
  font-family: Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Heiti SC", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
a
  outline: none
  -webkit-tap-highlight-color: rgba(0,0,0,0)
@media (-webkit-min-device-pixel-ratio:1.5),(min-device-pixel-ratio:1.5),(min--moz-device-pixel-ratio:1.5)
  .border-1px
    &::after
      -webkit-transform: scaleY(0.7)
      transform: scaleY(0.7)
@media (-webkit-min-device-pixel-ratio:2),(min-device-pixel-ratio:2),(min--moz-device-pixel-ratio:1.5)
  .border-1px
    &::after
      -webkit-transform: scaleY(0.5)
      transform: scaleY(0.5)
.clearfix
  display: inline-block
  &::after
    content: '.'
    display: block
    height: 0
    line-height: 0
    clear: both
    visibility: hidden
